linux-kernel - Re: [PATCH 0/4] FS: userspace notification of errors

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Message-ID: <4A28FC8F.5020802@nokia.com>
Date:	Fri, 05 Jun 2009 14:07:59 +0300
From:	Artem Bityutskiy <Artem.Bityutskiy@...ia.com>
To:	Kay Sievers <kay.sievers@...y.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Denis Karpov <ext-denis.2.karpov@...ia.com>, axboe@...nel.dk,
	hirofumi@...l.parknet.co.jp, linux-ext4@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	adrian.hunter@...ia.com
Subject: Re: [PATCH 0/4] FS: userspace notification of errors

Kay Sievers wrote:
> And I don't think we want several event sources for the same thing,
> uevents _and_ pollable sysfs files.
> 
> We already raise events on /proc/self/mountinfo when the mount tree
> changes, I guess that's where fs specific stuff belongs, and it will
> work with all kind of filesystem setups, regardless of the devices
> below it. This is also the established interface for flags and options
> and the current state of the filesystem, and does not mix filesystem
> options into block device interfaces.
> 
> /proc/self/mountinfo could also work properly with namespaces which
> might have different meaning for a device in a different namespace.

Well, Denis suggests /sys/fs instead. But how would we pass stuff like
error code via /proc/self/mountinfo? And what if later some one wants
to provide user-space stuff like bogus inode number? IMO, /sys/fs
sounds better.

-- 
Best Regards,
Artem Bityutskiy (Артём Битюцкий)
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